Compare Type L and Type M copper tubing.

Compare Type L and Type M copper tubing.

• A. Type L has thicker walls and higher pressure rating.
• B. Type L is thinner than Type M and used where pressure demand is lower.
• C. Type L is used for gas lines.
• D. Type L and Type M have identical thickness.

Answer: (A)

Wall thickness controls how much pressure a copper tube can safely carry. Type L has thicker walls than Type M, which gives it a higher pressure rating and greater burst strength. That makes Type L the better choice for typical plumbing service where moderate to higher pressures are expected. Type K is even thicker and used for even more demanding situations, while Type M is thinner and cheaper for lighter-duty, lower-pressure applications. So the statement that Type L has thicker walls and a higher pressure rating is the accurate description.

Wall thickness controls how much pressure a copper tube can safely carry. Type L has thicker walls than Type M, which gives it a higher pressure rating and greater burst strength. That makes Type L the better choice for typical plumbing service where moderate to higher pressures are expected. Type K is even thicker and used for even more demanding situations, while Type M is thinner and cheaper for lighter-duty, lower-pressure applications. So the statement that Type L has thicker walls and a higher pressure rating is the accurate description.